wait until firebase retrieves data

Question

I want to build a method that returns a child value in FireBase. I tried to do something like this:

public String getMessage(){

           


        

Answer 1

You can follow this link https://youtu.be/LVaIArVY52U

Firebase database is quite slow when retrieving the data so to make the application wait for the process to complete you can follow this

Create a new class Ex. Firebasedata.java and extent it with Application and add put this code in the OnCreate sections

public class Firebasedata extends Application {
    @Override
    public void onCreate() {
        FirebaseDatabase.getInstance().setPersistenceEnabled(true);
        super.onCreate();
    }
}

declare the java class in the manifests

Then go back to the class where you want to get the data and create a dialog with this code

    ProgressDialog TempDialog;
    CountDownTimer mCountDownTimer;
    int i=0;

        TempDialog = new ProgressDialog(MainActivity.this);
        TempDialog.setMessage("Please wait...");
        TempDialog.setCancelable(false);
        TempDialog.setProgress(i);
        TempDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
        TempDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.GRAY));

 TempDialog.show();
        mCountDownTimer = new CountDownTimer(2000, 1000)
        {
            public void onTick(long millisUntilFinished)
            {
                TempDialog.setMessage("Please wait..");
            }

            public void onFinish()
            {
                TempDialog.dismiss();
                //Your action like intents are placed here

            }
        }.start();

You can look into the link above and get a better idea